:root{
    --paper: #f3eedb;
    --paper-line: #b9cbe0;
    --margin-red: #c85a4a;
    --ink: #223c5a;
    --ink-soft: #55708c;
    --pen-red: #b8412f;
    --pencil-gray: #7a7565;
    --gold: #c8932f;
    --good: #3f7a52;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background: #ded6bd;
    background-image:
      radial-gradient(circle at 20% 10%, rgba(255,255,255,0.25), transparent 40%),
      radial-gradient(circle at 90% 80%, rgba(0,0,0,0.05), transparent 45%);
    font-family: 'Nanum Gothic', sans-serif;
    color: var(--ink);
    min-height: 100vh;
    display:flex;
    align-items:flex-start;
    justify-content:center;
    padding: 32px 14px 60px;
  }

  .page{
    width: 100%;
    max-width: 640px;
    background: var(--paper);
    background-image: repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 33px,
      var(--paper-line) 34px
    );
    box-shadow: 0 18px 50px rgba(30,20,10,0.35), 0 2px 0 rgba(255,255,255,0.4) inset;
    border-radius: 4px;
    position: relative;
    padding: 36px 28px 40px 56px;
    overflow: hidden;
  }
  .page::before{
    content:"";
    position:absolute;
    top:0; bottom:0; left:34px;
    width:2px;
    background: var(--margin-red);
    opacity:0.55;
  }
  .page::after{
    content:"";
    position:absolute;
    top:0; left:0; right:0; height:10px;
    background: repeating-linear-gradient(90deg, transparent 0 18px, rgba(0,0,0,0.06) 18px 19px);
  }

  h1{
    font-family:'Gaegu', sans-serif;
    font-size: 34px;
    margin: 4px 0 2px;
    color: var(--ink);
  }
  .sub{
    font-size:13.5px;
    color: var(--ink-soft);
    margin-bottom: 10px;
    line-height:1.5;
  }
  .privacy-note{
    font-size:11.5px;
    color: var(--good);
    background: rgba(63,122,82,0.1);
    border: 1px solid rgba(63,122,82,0.3);
    border-radius: 6px;
    padding: 6px 10px;
    margin-bottom: 20px;
    display:inline-block;
  }

  .row{
    display:flex;
    gap:10px;
    margin-bottom:12px;
    flex-wrap:wrap;
  }
  .field{
    flex:1;
    min-width: 140px;
  }
  .field label{
    display:block;
    font-size:12px;
    color: var(--ink-soft);
    margin-bottom:4px;
    font-weight:700;
  }
  .field input{
    width:100%;
    font-family:'Gaegu', sans-serif;
    font-size:20px;
    padding:9px 10px;
    border: none;
    border-bottom: 2px solid var(--ink-soft);
    background: rgba(255,255,255,0.35);
    color: var(--ink);
    outline:none;
    border-radius: 2px 2px 0 0;
  }
  .field input:focus{ border-bottom-color: var(--pen-red); background: rgba(255,255,255,0.6); }

  .actions{ display:flex; gap:10px; align-items:center; justify-content:flex-end; margin-top:6px; margin-bottom: 8px;}
  button.primary{
    font-family:'Gaegu', sans-serif;
    font-size:18px;
    font-weight:700;
    padding:10px 22px;
    background: var(--pen-red);
    color: #fff8ef;
    border:none;
    border-radius: 6px;
    cursor:pointer;
    box-shadow: 0 3px 0 #8a2f22;
    transition: transform .08s ease, box-shadow .08s ease;
  }
  button.primary:active{ transform: translateY(3px); box-shadow: 0 0 0 #8a2f22; }
  button.ghost{
    font-family:'Nanum Gothic', sans-serif;
    font-size:13px;
    background:none;
    border: 1px solid var(--ink-soft);
    color: var(--ink-soft);
    padding:8px 14px;
    border-radius:6px;
    cursor:pointer;
  }
  .error{
    font-size:12.5px;
    color: var(--pen-red);
    min-height: 16px;
    margin-bottom: 4px;
  }
  .info-note{
    font-size:12px;
    color: var(--ink-soft);
    background: rgba(200,147,47,0.14);
    border: 1px solid rgba(200,147,47,0.35);
    border-radius: 6px;
    padding: 6px 10px;
    margin-bottom: 8px;
    display:none;
  }
  .info-note.show{ display:block; }

  .section-title{
    font-family:'Gaegu', sans-serif;
    font-size:16px;
    color: var(--ink-soft);
    margin: 26px 0 10px;
    display:flex;
    align-items:center;
    gap:8px;
  }
  .section-title::before{
    content:"";
    width:8px; height:8px;
    background: var(--gold);
    border-radius:50%;
    display:inline-block;
  }

  /* ---- decomposition chips ---- */
  #decomp{ display:flex; flex-direction:column; gap:10px; }
  .name-line{ display:flex; gap:8px; flex-wrap:wrap; align-items:center; }
  .name-tag{
    font-family:'Gaegu', sans-serif;
    font-size:13px;
    color: var(--ink-soft);
    width: 44px;
  }
  .syll{
    display:inline-flex;
    align-items:center;
    gap:5px;
    background: rgba(255,255,255,0.5);
    border: 1px solid rgba(85,112,140,0.35);
    border-radius: 8px;
    padding: 5px 8px 5px 10px;
    opacity:0;
    transform: translateY(6px);
    animation: pop .35s ease forwards;
  }
  .syll .ch{ font-family:'Gaegu', sans-serif; font-size:19px; font-weight:700; }
  .syll .jamos{ font-size:11px; color: var(--ink-soft); display:flex; gap:3px;}
  .syll .jamos b{ color: var(--pen-red); }
  .syll .eq{
    font-family:'Gaegu', sans-serif;
    font-weight:700;
    font-size:16px;
    background: var(--ink);
    color: #fff;
    border-radius:5px;
    min-width:22px;
    height:22px;
    display:flex; align-items:center; justify-content:center;
  }
  @keyframes pop{ to{ opacity:1; transform: translateY(0);} }

  /* ---- pyramid ---- */
  #pyramid{
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:8px;
    padding: 10px 0 4px;
  }
  .prow{ display:flex; gap:8px; }
  .cell{
    width:34px; height:34px;
    border-radius:50%;
    background: #fff;
    border:1.5px solid var(--ink-soft);
    display:flex; align-items:center; justify-content:center;
    font-family:'Gaegu', sans-serif;
    font-weight:700;
    font-size:15px;
    color: var(--ink);
    opacity:0;
    transform: scale(.4);
    animation: cellIn .28s cubic-bezier(.4,1.6,.5,1) forwards;
    position:relative;
  }
  .cell.first-row{ background: #fff3d6; border-color: var(--gold); }
  .cell.glow{ box-shadow: 0 0 0 3px rgba(200,90,74,0.45); border-color: var(--pen-red); }
  .cell.final{ background: var(--pen-red); border-color:#7f2b1f; color:#fff; width:40px; height:40px; font-size:18px; }
  @keyframes cellIn{ to{ opacity:1; transform: scale(1);} }

  /* ---- result ---- */
  #result{
    margin-top: 22px;
    text-align:center;
    opacity:0;
    transform: translateY(8px);
    transition: opacity .5s ease, transform .5s ease;
  }
  #result.show{ opacity:1; transform: translateY(0); }
  .percent{
    font-family:'Gaegu', sans-serif;
    font-size:56px;
    font-weight:700;
    color: var(--pen-red);
    line-height:1;
  }
  .percent span{ font-size:26px; }
  .meter{
    width: 100%;
    max-width: 320px;
    height: 10px;
    background: rgba(85,112,140,0.2);
    border-radius: 6px;
    margin: 10px auto 12px;
    overflow:hidden;
  }
  .meter-fill{
    height:100%;
    width:0%;
    background: linear-gradient(90deg, var(--gold), var(--pen-red));
    transition: width 1s cubic-bezier(.3,.9,.3,1);
  }
  .message{
    font-family:'Gaegu', sans-serif;
    font-size:19px;
    color: var(--ink);
  }
  .footnote{
    margin-top: 20px;
    font-size:11px;
    color: var(--ink-soft);
    text-align:center;
    line-height:1.5;
  }

  .share-row{
    display:flex;
    justify-content:center;
    gap:8px;
    margin-top: 16px;
    flex-wrap:wrap;
  }
  button.share{
    font-family:'Gaegu', sans-serif;
    font-size:15px;
    font-weight:700;
    padding:9px 18px;
    background: #fce16a;
    color: #4a3a10;
    border: 1.5px solid #d4a017;
    border-radius: 8px;
    cursor:pointer;
    box-shadow: 0 2px 0 #b98a12;
  }
  button.share:active{ transform: translateY(2px); box-shadow:none; }
  button.share:disabled{ opacity:.6; cursor:default; }
  .share-hint{
    font-size:11px;
    color: var(--ink-soft);
    text-align:center;
    margin-top:6px;
  }

  #stage2, #stage3{ display:none; }

  .home-link{
    margin-bottom: 14px;
  }
  .home-link a{
    font-family:'Nanum Gothic', sans-serif;
    font-size:12.5px;
    color: var(--ink-soft);
    text-decoration:none;
    border-bottom: 1px dashed var(--ink-soft);
    padding-bottom: 1px;
  }
  .home-link a:hover{ color: var(--pen-red); border-bottom-color: var(--pen-red); }

  .site-footer-note{
    margin-top: 26px;
    padding-top: 14px;
    border-top: 1px dashed rgba(85,112,140,0.35);
    font-size: 11px;
    color: var(--ink-soft);
    text-align: center;
  }
  .site-footer-note a{ color: var(--ink-soft); text-decoration:none; }
  .site-footer-note a:hover{ color: var(--pen-red); }

/* ---- SY Project 안내/FAQ 섹션 ---- */
.sy-info{ margin-top:28px; padding-top:20px; border-top:1px dashed var(--paper-line); }
.sy-info h2{ font-family:'Gaegu', sans-serif; font-size:17px; color:var(--ink); margin-bottom:10px; }
.sy-info > p{ font-size:13.5px; line-height:1.75; color:var(--ink-soft); margin-bottom:16px; }
.sy-faq details{ border-top:1px dashed var(--paper-line); padding:12px 0; }
.sy-faq summary{ cursor:pointer; font-weight:700; font-size:13.5px; color:var(--ink); list-style:none; }
.sy-faq summary::-webkit-details-marker{ display:none; }
.sy-faq summary::before{ content:'✎ '; color:var(--pen-red); }
.sy-faq details p{ margin-top:8px; font-size:13px; color:var(--ink-soft); line-height:1.7; }